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Biomedical subjects

W W ACKERMANN

Publications and source records attributed to W W ACKERMANN.

At least 19 recordsLinked to original sources
PubMed1957

Growth characteristics of poliovirus in HeLa cells: nucleic acid metabolism.

The RNA and DNA contents of the nucleus and cytoplasm of the HeLa cell were determined. The rates of incorporation of P(32) into the various nucleic acid fractions were established for the ordinary HeLa cell maintained under a set of standard conditions. The changes in the rates of incorporation of P(32) and in the amounts of RNA and DNA which occurred subsequent to infection with poliovirus were followed throughout the infectious cycle. These changes were correlated with the intracellular appearance of the newly formed virus. A net synthesis of RNA occurred in the cytoplasmic component of the cell. The increase was detectable 2 hours before the first appearance of demonstrable virus and reached a maximum (2.5 times normal) at 6 hours. Viral increase was not maximal before the 7th hour after infection.

Cell Nucleus↗
PubMed1956

Growth characteristics of influenza virus; properties of the initial cell-virus complex.

The rate has been determined at which the initial stable complex is formed between cells of the chorioallantoic membrane and the PR8 strain of type A influenza virus. Characterization of the complex revealed the following properties: (a) stability to dilution and to simple washing with buffered saline, (b) insensitivity to the action of receptor-destroying enzyme (obtained from cholera vibrio), (c) sensitivity to the inhibitory effect of anti-viral immune serum, (d) formation of the complex at low temperatures, 3 degrees C., (e) accompanied by a loss of detectable viral infectivity from the reaction mixture, (f) stability at 3 degrees C. but transformation at 37 degrees C. to a state which is resistant to the inhibitory action of a specific anti-viral serum. The rate of this latter transformation has been determined. The infectious process in more than 50 per cent of the cells can be influenced by immune serum 2 hours after the completion of the initial reaction with virus.

Influenza A virus↗